Robin Mordasiewicz wrote:
less resource intensive becuase of the indexes, which are small databases which contain information about the users mail. Don't make your choice base on this alone, becuase it is not very easy to cluster cyrus servers.
I don't have it in production, but it wasn't too hard to set up an imap murder scenario. And adding additional backend servers to that is a piece of cake.
If you only have one server then choose cyrus, but if you possibly are able to accumulate older servers to cluster them, then choose courier.
I don't see the "hardship" in clustering cyrus imap boxes. And I don't see the ease in clustering courier servers, but I've never done that, so I'm probably not the person to judge about that.
Ralph